Automatic circuit-closer for electric-lamp holders.



W. D. & L- b. TICKNER A I AUTOMATIC CIRCUIT CLOSER FOR ELECTRIC LAMP HOLDERS; 900,61 3. Patented-oat; 6, 1908.

AVAHfiBLE QQPY APPLICATION FILED mm. 3, 190a.

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PATEN OFFICE WILLIAM D. TIOKNER AND LUGIUS O. TICKNER, OF BLANCHARDVILLE, WISCONSIN, ASSIGNORS OF ONE-HALF TO CHARLES MICROWELL, OF BLANCHARDVILLE, WIS- CONSIN.

AUTOMATIC CIRCUIT-CLOSER FOR ELECTRIC-LAMP HOLDERS.

No. 900,613. Specification of Letters Patent. Patented Goth 6, 1908.

Application filed February 3, 1908. Serial No. 414,085.

To all whom it may concern:

Be it known that we, WILLIAM D. TIoK- NER and LUcIUsC. TIOKNER, citizens of the United States, residing at Blanchardville, in the county of Lafayette, State of Wisconsin, have invented a new and useful Automatic Circuit-Closer for ElectricLamp Holders, of which the following is a specification.

This invention has relation to automatic circuit closers for electric lamp holders and it consists in the novel construction and arrangement of its parts as hereinafter shown and described.

The object of the invention is to provide 'a holder for an electric lamp which is provided with a means for automatically closingthe electric circuit to the lamp when the weight of the lamp is removed from the holder and conversely the said circuit is opened when the lamp is placed upon the holder. when the lamp is removed from the holder it is automatically lighted and is automatically extinguished when placed upon the holder. Such lamps are especially convenient. for use by dentists and surgeons during operations where light is desired at particular quarters and the holder is also economical in that the electric current is not consumed while the lamp is out of use.

In the drawing the figure is an elevation of the holder showing the circuit closer in section.

The holder consists of the base plate 1 upon which is mountedthe block 2 the arm 3 extends laterally from the block and base plate and the sleeve 4 is pivotally connected to the upper outer end of the said arm. The book section 5 is slidably mounted in the sleeve 4 and may be fixed with relation thereto by means of the set screw 6. The rod 7 is attached to the sleeve 4 and the weight 8 is shiftably mopnted upon the rod 7 and may be fixed with relation thereto by means of the set'scrcw 9. The rod 7 has a pin and slot connection 10 with the plunger rod 11 which extends intothe interior of the block 1 and may slide longitudinally with relation to the same. -,The plunger 12 i'scar-f "'r'iedby the lowe'rendof the rod 11 and 1s 10- 5o cated'in the chamber'13 provided in the block 2. Said chamber 13 is adapted to contain a Thus liquid 14, such as mercury, or any other good conductor of electricity. The wire 15 is con 16 and at its other end connects wit 1 the terminal 17 which is located above the normal level of the liquid 14 in the chamber 13. Said terminal 17 passes transversely through the side of the block 2. The terminal 18 also passes transversely through the side of the block 2 and its inner end is located below the 13. The wire 19 connects the terminal 18 with the filament of the lamp 20 and the wire 21 connects the filament of the lamp 20 with the pole of the generator 16 opposite to that with which the wire 15 is connected.

When the lamp 20 is suspended from the hook member 5 as shown in the drawing the weight of the said lamp swings the sleeve 4 which moves the rod 7 vertically and elevates the rod 11 and plunger 12. Asthe said plunger is withdrawn from the liquid 14 the level of the said liquid falls below the terminal 17. Thus the circuit from the generator 16 is opened and the lamp 20 is extinguished. When however the said lamp is removed from the hook member 5 the rod 11 and plunger 12 descend under the action of the weight 8 and the said plunger 12 displaces the liquid 14 which causes the level thereof I to ascend above the terminal "17 when the electric circuit is completed from the generator 16 through the lamp 20 and the same is lighted.

Having described our invention, what we claim as new and desire tosecure by Letters Patent is:

1. An automatic circuit closer for electric lamp holders comprising a pivotally mounted lamp holder, a plunger and plunger rod connected with the same, a chamber receiving the plunger, a liquid located in said chamber and adapted to be displaced b immersion of the plunger, electric tcrmina s entering the chamber at different levels and a lamp'electrically connected with the ter minals and a generator.

comprising a pivotally "mountedKholder a weight shiftably mounted thereon,"a plunger operatively connected with the holder, a

nected at one end with an electric enerator level of the liquid 14. located in'the chamber An automatic'circui't closer forlainps" chamber receiving said plun er; a conducting liquid located in the chaIn ber, an eleetrie generator, terminals entering the chamber at difierent levels and a, lamp adapted to be suspended from the holder and being electrically connected with the generator 'and terminals.

In testimony that We claim theforegoing as our own, we have hereto nil-med o1 11' signatures in the presence of two Witnesses.

WILLIAM D. 'IICKNER; L'UCIUS C, TICKNER,

\Nitnesses:

M. J. CLEARY, W. F. MCGUIGAN. 

